The scatterplot shows the federal minimum wage rates in the United States, calculated every five years from 1970 (year 1 on the graph) to 2005 (year 8). Which is the best equation of the trend line for the scatterplot? y = –0.45x + 1.55 y = –0.45x – 1.55 y = 0.45x + 1.55 y = 0.45x – 1.55